#include <iostream>
using namespace std;

/*class Date {
public:
    void Print() const
    {
        printf("%d-%02d-%02d", _year, _month, _day);
        printf("\n");

    }
    Date(int year, int month, int day)
        : _year(year)
        , _month(month)
        , _day(day) {

    }
    int GetMonthDay(int year, int month)const {
        int Day[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

        if ((month == 2) && ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)) {
            return 29;
        }
        else {
            return Day[month];
        }
    }
    Date& operator-=(int day) {
        if (day < 0) {
            *this += -day;
            return *this;
        }
        _day -= day;
        while (_day <= 0) {
            --_month;
            if (_month == 0) {
                --_year;
                _month = 12;
            }
            _day += GetMonthDay(_year, _month);
        }

        return *this;
    }
    Date& operator+=(int day) {
        if (day < 0) {
            *this -= -day;
            return *this;
        }
        _day += day;
        while (_day > GetMonthDay(_year, _month)) {
            _day -= GetMonthDay(_year, _month);
            ++_month;
            if (_month == 13) {
                _year++;
                _month = 1;
            }
        }
        return *this;
    }
private:
    int _year;
    int _month;
    int _day;
};

int main() {
    int a, year, month, day, quen;
    cin >> a;
    while (a--) {
        scanf("%d%d%d%d", &year, &month, &day, &quen);
        Date d(year, month, day);
        d += quen;
        d.Print();
    }
}*/



int main()
{
    char char2[] = "abcd";
    cout << *char2 << endl;
    return 0;
}